Before the draft ended on Saturday, the Texans were calling agents about signing their clients who might go undrafted. You never know when general manager Rick Smith might uncover another Arian Foster, who went from undrafted free agent to the Pro Bowl. After they drafted nine players in the first six rounds, the Texans turned their attention to undrafted free agents. The most prominent was Kansas State quarterback Collin Klein, who was a Heisman Trophy candidate last season.